Symmetry Line Symmetry n Shape has line symmetry

Symmetry

Line Symmetry n Shape has line symmetry when one half of it is the mirror image of the other half. n Think of it like a fold line.

Line Symmetry If a shape can be folded in half so that one half fits exactly on top of the other, then we say that the shape has got line symmetry. n The fold is called a line of symmetry. n This shape has got a vertical line of symmetry. n

Is a butterfly symmetrical?

At the beach there are lots of shells with line symmetry.

Under the sea there also many symmetrical objects. 1 1 2 3 4 5

Land animals often have symmetry, too.

Do these masks have a line of symmetry? Yes, they do.

If an object is reflected in water it is considered to have line symmetry along the waterline.

The Taj Mahal Symmetry exists in architecture all around the world. One of the best known examples of this is the Taj Mahal in India.

This photograph shows 2 lines of symmetry. Where are they?

Which of these road signs have lines of symmetry?

Line Symmetry with Pentominoes How many lines of symmetry does each Pentomino have?

Line Symmetry with Polygons How many lines of symmetry does each polygon have?

Line Symmetry in the Alphabet Which letters have got lines of symmetry? A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

How many lines of symmetry in an equilateral triangle?

an equilateral triangle has 3 angles and 3 lines of symmetry

How many lines of symmetry in a square?

a square has 4 angles and 4 lines of symmetry

How about a regular pentagon?

a regular pentagon has 5 angles and 5 lines of symmetry

A hexagon?

a regular hexagon has 6 angles and 6 lines of symmetry

An octagon?

a regular octagon has 8 angles and 8 lines of symmetry

Did you see a pattern there? What is your prediction for this regular decagon? Yes! It’s 10.